Form-work with stake mounting means

ABSTRACT

Concrete form-work including an edge beam having a stop flange projecting rearwardly from the beam at each of a plurality of pegging stations, each of which has a peg clearance hole, a starsectioned metal peg, at each station, extending through the clearance hole and a wedge which is driven through the hole to tighten the edge beam against the peg. One of the flanges of the peg is shorter than the other flanges to fit against the rear face of the edge beam and the under face of the stop flange.

United States Patent 1191 Langford Oct. 7, 1975 FORM-WORK WITH STAKEMOUNTING MEANS [76] Inventor: Richard Langford, Reid Park, Mona ValeRd., Ingleside, New South Wales, Australia [22] Filed: Sept. 6, 1973[21] Appl. No.: 394,628

[30] Foreign Application Priority Data Sept. 6, 1972 Australia 335/72[52] US. Cl 249/7; 249/208 [51] Int. Cl. EOlC 7/00 [58] Field of Search249/2-9, 165-166, 249/205, 207208 [56] References Cited UNITED STATESPATENTS 1,987,589 l/1935 Goetz 249/3 2,180,842 11/1939 Winding ..249/82,835,017 5/1958 Hoerr 249/207 2,875,500 3/1959 Stough 249/6 2,917,80312/1959 Phillips 249/6 2,937,430 5/1960 Trentacosti 249/7 PrimaryExaminerRobert D. Baldwin Assistant Examiner-John McQuade Attorney,Agent, or FirmStevens, Davis, Miller & Mosher [57] ABSTRACT Concreteform-work including an edge beam having a stop flange projectingrearwardly from the beam at each of a plurality of pegging stations,each of which has a peg clearanc hole, a star-sectioned metal peg, ateach station, extending through the clearance hole and a wedge which isdriven through the hole to tighten the edge beam against the peg. One ofthe flanges of the peg is shorter than the other flanges to fit againstthe rear face of the edge beam and the under face of the stop flange.

10 Claims, 14 Drawing Figures US. Patent Oct. 7,1975 Sheet 2 of23,910,545

FIG.'?

FIG.11

FIG 13 V FIG 12 F ORM-WORK WITH STAKE MOUNTING MEANS This inventionrelates to form-work of the kindused at building sites and the like tocontain concrete foundations and floor slabs during the in-situ castingthereof. Conventionally; such form-work comprises edge beams of timber,whichare placed as a boundary to the concrete work and supported orfixed in place by pegs, which conventionally are also wood, driven intothe ground and secured usually by nails to the edge beam. i

Prior known timber form-work has been inconvenient due to the fact thatit is usually damaged sufficiently during dismantling after a particularjob is finished to render it unfit for further use, or at the best, itslife is limited to a small number of individual usages.

An object of the present invention is to provide formwork which iseconomical and is conveniently assembled and which may be just asconveniently disassembled and thereafter used a considerable number oftimes before it is worn .to a point requiring it to be scrapped.

The invention achieves that object by providing form-work includingmetal pegs and edge beams adapted to be fixed thereto by wedges.

The invention consists in concrete form-work comprising an edge beamhaving a stop flange, projecting rearwardly from the beam at least eachof a plurality of pegging stations, means defining a pegclearance holeat each pegging station through which a peg may extend downwardly, astar-sectioned metal peg, as defined herein, at each station extendingthrough said clearance hole and with at least one of its flanges steppedto fit against the rear face of the edge beam and the under face of thestop flange and a wedge adapted to be driven through said clearance holeto tighten the edge beam against the peg.

According to some embodiments of the invention the clearance hole isformed in the stop flange itself which, thus, serves not only as a stopcontacting the top of the step in the peg to fix the height of the edgebeam relative to the peg but also as the means defining the pegclearance hole.

In other embodiments of the invention those means may comprise abridge-piece, or the like, extending horizontally rearwardly from therear face of the edge beam.

References herein to a star-sectioned peg are intended to be referencesto any metal peg having three or more flanges which, when seen incross-section, extend outwardly from a more-or-less common point. Forexample, each peg may be cruciform in cross-section, it may be oftee-section, but for preference it is of three flanges radiating from amore-orless cen'tral spine with included angles between the flanges ofapproximately 120. Such three flanged star-sectioned material is wellknown and is conventionally used as metal fence posts or droppers forpost and wire fences.

By way of example, two embodiments of the invention are describedhereinafter with reference to the accompanying drawings.

FIG. I is a rear elevation of a length of form-work according to theinvention.

FIG. 2 is a plan view of the form-work of FIG. 1.

FIG. 3 is a sectional view taken on line 33 of FIG.

FIG. 4 is a sectional view taken on line 44 of FIG.

I drawn to a larger scale.

FIG. 5 is aview taken on line 5-5 of FIG. 1 drawn to a larger scale.

FIG. 6 is a side elevation of a peg having a component of the form-workof FIG. 1.

FIG. 7 is a front elevation of the peg of FIG. 6.

FIG. 8 is a plan view of the peg of FIG. 6.

FIG. 9 is a front elevation of a wedge, having a component of theform-work of FIG. 1.

FIG. 10 is a side elevation of the wedge of FIG. 9.

FIG. 11 is a plan view of the wedge of FIG. 9.

FIG. 12 is a view similar to FIG. 5 of a second embodiment of theinvention.

FIG. 13 is a view similar to FIG. 6 of the peg of the FIG. 12embodiment.

FIG. 14 is a plan view of the peg of FIG. 13.

The embodiment of the invention illustrated by FIGS. 1 to 11 comprisestwo lengths of edge beam 15, each comprising a sheet metal strip 16 withtwo rolled steel angles 17 welded to it. In use, the projectinghorizontal flange 18 of the upper angle 17 constitutes the edge beamsstop flange.

At each end of length of edge beam an upright angle 19 is welded to thestrip 16. The protruding flange of each angle 19 is pierced by two holes20, through which tapered tommy bars 21 may be driven to align onelength with another. Thus, each beam 15 has a stop flange extending forits full length and not only at the respective pegging stations.However, at each pegging station there is a peg clearance hole 22defined by a bridge piece 23.

In another embodiment that hole may be in the form of a longitudinallyextending slot piercing the stop flange.

Also, at each pegging station a three flanged starsectioned metal peg 24is provided with one of its flanges 25 cut away at the ends so that itis in effect shorter than the other two flanges. The arrangement is suchthat the shorter flange 25 of the peg 24 may fit neatly against the backface of the edge beam 15, with the upper end of the shorter flange 25contacting the underside of the beams stop flange and at the same timethe remaining two flanges of the peg 24 protrude upwardly through thehole 22.

Thus the pegs 24 may be driven into the ground in alignment and to apredetermined depth and thereafter the edge beams 15 may simply beplaced upon the pegs to rest loosely in position. Thereafter a wedge 26may be driven into the hole 22 at each station until it is tight againstthe peg projecting upwardly through it.

For preference, the wedge 26 may comprise a partly folded vee-shapedmetal sheet 27, adapted to fix snugly against the two longer flanges ofthe peg and an anvil piece 28 adapted to be struck by a hammer to drivethe wedge home. For preference each wedge is secured loosely by a chainor the like to its peg to prevent the two from becoming separated.

The lower end of each peg 24 may be tapered or each flange may beindividualy tapered to provide in the first case a single point 29, andin the other case three separate points.

If desired, the edge beam may be pierced at intervals by clearance holes30 through which re-inforcing rods for the concrete may extend.

In some cases, the stop flange may be integral with the main bodyportion of the edge beam so that the latter has a completely planarfront face. However, for preference, the stop flange is one flange of aconventional rolled steel angle as illustrated, with the other flange ofthe angle overlying the upper edge margin of the front face of thatstrip. Thus, the finished edge beam has a shoulder extending along theupper edge of its front face which produces a corresponding recess inthe edge of the concrete contained by the form-work during the pouringoperation.

The embodiment shown in FIGS. l2, l3 and 14 is the same as that shown inFIGS. 1-11 except for the flange 25A and flag 31. As illustrated, flange25A is equal in length. to the other two flanges of peg 24A. Flag 31extends from flange 25A and is shorter than the other flanges so that itmay fit neatly against the back face of the edge beam 15, with the upperend of the flag 31 contacting the underside of the beams stop flange.The three flanges of the peg 24A protrude upwardly through the holeprovided by bridge piece 23A.

I claim:

1. Concrete form-work comprising an edge beam having a stop flangeprojecting rearwardly from the beam at least at each of a plurality ofpegging stations, means defining a peg clearance hole at each peggingstation through which a peg may extend downwardly, a star-sectionedmetal peg having a plurality of flanges, said metal peg at each stationextending through said clearance hole and with at least one of itsflanges vstepped to fit against the rear face of the edge beam and theunder face of the stop flange, and a wedge adapted to be driven throughsaid clearance hole to tighten the edge beam against the peg.

2. The apparatus of claim 1 wherein said starsectioned metal pegcomprises three flanges radiating from a central spine, said peg havingincluded angles between the three flanges of approximately 3. Theapparatus of claim 2 wherein said one flange is shorter than the othertwo flanges.

4. The apparatus of claim 3 wherein the other two flanges protrudeupwardly through said clearance hole.

5. The apparatus of claim 4 wherein said wedge comprises a V-shapedmetal sheet, said sheet fitting snugly against said other two flanges.

6. The apparatus of claim 5 wherein the lower end of the peg is taperedto a single point.

7. The apparatus of claim 5 wherein the lower end of each of the flangesis tapered to a single point.

8. The apparatus of claim 6 wherein said stop flange is integral withsaid edge beam.

9. The apparatus of claim 6 wherein said stop flange comprises oneflange of a rolled steel angle, the other flange of the angle overlyinga face of the edge beam.

10. Concrete form-work comprising an edge beam having a stop flangeprojecting rearwardly from the beam at least at each of a plurality ofpegging stations, means defining a peg clearance hole at each peggingstation through which a peg may extend downwardly, a star-sectionedmetal peg having a plurality of flanges and a flag connected to one ofthe plurality of flanges, said metal peg at each station extendingthrough said clearance hole and with said flag fitted against the rearface of the edge beam and the under face of the stop flange, and a wedgewithin said clearance hole to tighten the edge beam against the peg.

1. Concrete form-work comprising an edge beam having a stop flangeprojecting rearwardly from the beam at least at each of a plurality ofpegging stations, means defining a peg clearance hole at each peggingstation through which a peg may extend downwardly, a star-sectionedmetal peg having a plurality of flanges, said metal peg at each stationextending through said clearance hole and with at least one of itsflanges stepped to fit against the rear face of the edge beam and theunder face of the stop flange, and a wedge adapted to be driven throughsaid clearance hole to tighten the edge beam against the peg.
 2. Theapparatus of claim 1 wherein said star-sectioned metal peg comprisesthree flanges radiating from a central spine, said peg having includedangles between the three flanges of approximately 120*.
 3. The apparatusof claim 2 wherein said one flange is shorter than the other twoflanges.
 4. The apparatus of claim 3 wherein the other two flangesprotrude upwardly through said clearance hole.
 5. The apparatus of claim4 wherein said wedge comprises a V-shaped metal sheet, said sheetfitting snugly against said other two flanges.
 6. The apparatus of claim5 wherein the lower end of the peg is tapered to a single point.
 7. Theapparatus of claim 5 wherein the lower end of each of the flanges istapered to a single point.
 8. The apparatus of claim 6 wherein said stopflange is integral with said edge beam.
 9. The apparatus of claim 6wherein said stop flange comprises one flange of a rolled steel angle,the other flange of the angle overlying a face of the edge beam. 10.Concrete form-work comprising an edge beam having a stop flangeprojecting rearwardly from the beam at least at each of a plurality ofpegging stations, means defining a peg clearance hole at each peggingstation through which a peg may extend downwardly, a star-sectionedmetal peg having a plurality of flanges and a flag connected to one ofthe plurality of flanges, said metal peg at each station extendingthrough said clearance hole and with said flag fitted against the rearface of the edge beam and the under face of the stop flange, and a wedgewithin said clearance hole to tighten the edge beam against the peg.